Signal transmission line connector



FIG. 1 is a front and left side perspective view of a signal transmission line connector, showing our new design;

FIG. 2 is front elevation thereof;

FIG. 3 is rear elevation thereof;

FIG. 4 is left side elevation thereof;

FIG. 5 is right side elevation thereof;

FIG. 6 is top plan view thereof; and,

FIG. 7 is bottom plan view thereof. 

The ornamental design for a “signal transmission line connector,” as shown and described. 